Update criterion requirement from 0.7 to 0.8

Updates the requirements on [criterion](https://github.com/criterion-rs/criterion.rs) to permit the latest version.
- [Release notes](https://github.com/criterion-rs/criterion.rs/releases)
- [Changelog](https://github.com/criterion-rs/criterion.rs/blob/master/CHANGELOG.md)
- [Commits](criterion-rs/criterion.rs@criterion-plot-v0.7.0...criterion-v0.8.0)

---
updated-dependencies:
- dependency-name: criterion
  dependency-version: 0.8.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

binding-generator/Cargo.toml

@@ -22,7 +22,7 @@ shlex = { version = "1.3", default-features = false }
 
 [dev-dependencies]
 tempfile = { version = "3", default-features = false }
-criterion = "0.7"
+criterion = "0.8"
 
 [features]
 clang-runtime = ["clang/runtime", "clang-sys/runtime"]